Base station controller (BSC)
Base station controller (BSC) • Manages a number of BTSs • Uses the Abis interface to connect to BTSs • BSCs reserve radio frequencies for communication and manage handovers between BTSs Base station controller (BSC) • A BSC along with the BTSs connected to it and the mobile stations managed through it forms a base station system (BSS) • Also connected to an MSC in the networking and switching layer using an interface A • Processing of signals • Controlling signals to the connected BTSs and control of handover of signals from one BTS to another within a BSS • Control and handover of the signals from BSC to MSC Important functions performed by the BSC • Mapping the signals of a channel─ at given instant receives signals from a BTS at 16 kbps through Abis and interfaces them to an MSC at 16 kbps • Alternatively, may have to interface to a PSTN switching centre at 64 kbps through a fixed line network─ mapped by assigning a 16 kbps channel for 64 kbps signals and vice versa • Reserv...